Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
8c5bd7ad RW |
46 | #include "internal.h" |
47 | ||
1da177e4 LT |
48 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
49 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
50 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
51 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
53 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
54 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
55 | ||
f4715189 TT |
56 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
57 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
58 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
59 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
60 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 61 | |
2f3d000a | 62 | #define MAX_NAME_LEN 20 |
1da177e4 | 63 | |
1da177e4 | 64 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 65 | ACPI_MODULE_NAME("video"); |
1da177e4 | 66 | |
f52fd66d | 67 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 68 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
69 | MODULE_LICENSE("GPL"); |
70 | ||
886129a8 | 71 | static bool brightness_switch_enabled; |
8a681a4d ZR |
72 | module_param(brightness_switch_enabled, bool, 0644); |
73 | ||
c504f8cb ZR |
74 | /* |
75 | * By default, we don't allow duplicate ACPI video bus devices | |
76 | * under the same VGA controller | |
77 | */ | |
90ab5ee9 | 78 | static bool allow_duplicates; |
c504f8cb ZR |
79 | module_param(allow_duplicates, bool, 0644); |
80 | ||
fbc9fe1b | 81 | /* |
0e9f81d3 AL |
82 | * For Windows 8 systems: used to decide if video module |
83 | * should skip registering backlight interface of its own. | |
fbc9fe1b | 84 | */ |
751109aa | 85 | static int use_native_backlight_param = 1; |
0e9f81d3 AL |
86 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); |
87 | static bool use_native_backlight_dmi = false; | |
fbc9fe1b | 88 | |
915ea7e4 | 89 | static int register_count; |
67b662e1 AL |
90 | static struct mutex video_list_lock; |
91 | static struct list_head video_bus_head; | |
4be44fcd | 92 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id video_device_ids[] = { |
97 | {ACPI_VIDEO_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
101 | ||
1da177e4 | 102 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 103 | .name = "video", |
1da177e4 | 104 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 105 | .ids = video_device_ids, |
1da177e4 LT |
106 | .ops = { |
107 | .add = acpi_video_bus_add, | |
108 | .remove = acpi_video_bus_remove, | |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
21fcb34e FC |
121 | u8 _DOS:1; /* Enable/Disable output switching */ |
122 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /* Get ROM Data */ | |
124 | u8 _GPD:1; /* Get POST Device */ | |
125 | u8 _SPD:1; /* Set POST Device */ | |
126 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 127 | u8 reserved:2; |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
132 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
133 | u32 display_type:4; /* Describe the specific type in use */ | |
134 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
135 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
136 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 137 | the VGA device. */ |
21fcb34e FC |
138 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
139 | u32 reserved:10; /* Must be 0 */ | |
140 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
99678ed7 | 153 | bool backlight_registered; |
53a92ba7 | 154 | bool backlight_notifier_registered; |
4be44fcd | 155 | u8 dos_setting; |
1da177e4 | 156 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
157 | u8 attached_count; |
158 | struct acpi_video_bus_cap cap; | |
1da177e4 | 159 | struct acpi_video_bus_flags flags; |
4be44fcd | 160 | struct list_head video_device_list; |
bbac81f5 | 161 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 162 | struct list_head entry; |
e9dab196 LY |
163 | struct input_dev *input; |
164 | char phys[32]; /* for input device */ | |
ac7729da | 165 | struct notifier_block pm_nb; |
53a92ba7 | 166 | struct notifier_block backlight_nb; |
1da177e4 LT |
167 | }; |
168 | ||
169 | struct acpi_video_device_flags { | |
4be44fcd LB |
170 | u8 crt:1; |
171 | u8 lcd:1; | |
172 | u8 tvout:1; | |
82cae999 | 173 | u8 dvi:1; |
4be44fcd LB |
174 | u8 bios:1; |
175 | u8 unknown:1; | |
91e13aa3 AL |
176 | u8 notify:1; |
177 | u8 reserved:1; | |
1da177e4 LT |
178 | }; |
179 | ||
180 | struct acpi_video_device_cap { | |
21fcb34e FC |
181 | u8 _ADR:1; /* Return the unique ID */ |
182 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
183 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 184 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 185 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 186 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
187 | }; |
188 | ||
d32f6947 ZR |
189 | struct acpi_video_brightness_flags { |
190 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 191 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 192 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
193 | }; |
194 | ||
1da177e4 | 195 | struct acpi_video_device_brightness { |
4be44fcd LB |
196 | int curr; |
197 | int count; | |
198 | int *levels; | |
d32f6947 | 199 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
200 | }; |
201 | ||
202 | struct acpi_video_device { | |
4be44fcd LB |
203 | unsigned long device_id; |
204 | struct acpi_video_device_flags flags; | |
205 | struct acpi_video_device_cap cap; | |
206 | struct list_head entry; | |
207 | struct acpi_video_bus *video; | |
208 | struct acpi_device *dev; | |
1da177e4 | 209 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 210 | struct backlight_device *backlight; |
4a703a8f | 211 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
212 | }; |
213 | ||
b7171ae7 | 214 | static const char device_decode[][30] = { |
1da177e4 LT |
215 | "motherboard VGA device", |
216 | "PCI VGA device", | |
217 | "AGP VGA device", | |
218 | "UNKNOWN", | |
219 | }; | |
220 | ||
4be44fcd LB |
221 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
222 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
223 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
224 | struct acpi_video_device *device); | |
1da177e4 | 225 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
226 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
227 | int level); | |
228 | static int acpi_video_device_lcd_get_level_current( | |
229 | struct acpi_video_device *device, | |
a89803df | 230 | unsigned long long *level, bool raw); |
4be44fcd LB |
231 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
232 | u32 level_current, u32 event); | |
c8890f90 | 233 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 234 | int event); |
1da177e4 | 235 | |
0e9f81d3 AL |
236 | static bool acpi_video_use_native_backlight(void) |
237 | { | |
238 | if (use_native_backlight_param != -1) | |
239 | return use_native_backlight_param; | |
240 | else | |
241 | return use_native_backlight_dmi; | |
242 | } | |
243 | ||
0b9f7d93 | 244 | bool acpi_video_verify_backlight_support(void) |
fbc9fe1b | 245 | { |
0e9f81d3 | 246 | if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && |
fbc9fe1b AL |
247 | backlight_device_registered(BACKLIGHT_RAW)) |
248 | return false; | |
249 | return acpi_video_backlight_support(); | |
250 | } | |
0b9f7d93 | 251 | EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support); |
fbc9fe1b | 252 | |
21fcb34e | 253 | /* backlight device sysfs support */ |
2f3d000a YL |
254 | static int acpi_video_get_brightness(struct backlight_device *bd) |
255 | { | |
27663c58 | 256 | unsigned long long cur_level; |
38531e6f | 257 | int i; |
7c364e79 | 258 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 259 | |
a89803df | 260 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 261 | return -EINVAL; |
38531e6f MG |
262 | for (i = 2; i < vd->brightness->count; i++) { |
263 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
264 | /* |
265 | * The first two entries are special - see page 575 | |
266 | * of the ACPI spec 3.0 | |
267 | */ | |
915ea7e4 | 268 | return i - 2; |
38531e6f MG |
269 | } |
270 | return 0; | |
2f3d000a YL |
271 | } |
272 | ||
273 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
274 | { | |
24450c7a | 275 | int request_level = bd->props.brightness + 2; |
7c364e79 | 276 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
277 | |
278 | return acpi_video_device_lcd_set_level(vd, | |
279 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
280 | } |
281 | ||
acc2472e | 282 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
283 | .get_brightness = acpi_video_get_brightness, |
284 | .update_status = acpi_video_set_brightness, | |
285 | }; | |
286 | ||
702ed512 | 287 | /* thermal cooling device callbacks */ |
4a703a8f | 288 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 289 | long *state) |
702ed512 | 290 | { |
4a703a8f | 291 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
292 | struct acpi_video_device *video = acpi_driver_data(device); |
293 | ||
6503e5df MG |
294 | *state = video->brightness->count - 3; |
295 | return 0; | |
702ed512 ZR |
296 | } |
297 | ||
4a703a8f | 298 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 299 | long *state) |
702ed512 | 300 | { |
4a703a8f | 301 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 302 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 303 | unsigned long long level; |
6503e5df | 304 | int offset; |
702ed512 | 305 | |
a89803df | 306 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 307 | return -EINVAL; |
6503e5df MG |
308 | for (offset = 2; offset < video->brightness->count; offset++) |
309 | if (level == video->brightness->levels[offset]) { | |
310 | *state = video->brightness->count - offset - 1; | |
311 | return 0; | |
312 | } | |
702ed512 ZR |
313 | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | static int | |
4a703a8f | 318 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 319 | { |
4a703a8f | 320 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
321 | struct acpi_video_device *video = acpi_driver_data(device); |
322 | int level; | |
323 | ||
915ea7e4 | 324 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
325 | return -EINVAL; |
326 | ||
327 | state = video->brightness->count - state; | |
915ea7e4 | 328 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
329 | return acpi_video_device_lcd_set_level(video, level); |
330 | } | |
331 | ||
9c8b04be | 332 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
333 | .get_max_state = video_get_max_state, |
334 | .get_cur_state = video_get_cur_state, | |
335 | .set_cur_state = video_set_cur_state, | |
336 | }; | |
337 | ||
21fcb34e FC |
338 | /* |
339 | * -------------------------------------------------------------------------- | |
340 | * Video Management | |
341 | * -------------------------------------------------------------------------- | |
342 | */ | |
1da177e4 | 343 | |
1da177e4 | 344 | static int |
4be44fcd LB |
345 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
346 | union acpi_object **levels) | |
1da177e4 | 347 | { |
4be44fcd LB |
348 | int status; |
349 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
350 | union acpi_object *obj; | |
1da177e4 | 351 | |
1da177e4 LT |
352 | |
353 | *levels = NULL; | |
354 | ||
90130268 | 355 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 356 | if (!ACPI_SUCCESS(status)) |
d550d98d | 357 | return status; |
4be44fcd | 358 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 359 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 360 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
361 | status = -EFAULT; |
362 | goto err; | |
363 | } | |
364 | ||
365 | *levels = obj; | |
366 | ||
d550d98d | 367 | return 0; |
1da177e4 | 368 | |
915ea7e4 | 369 | err: |
6044ec88 | 370 | kfree(buffer.pointer); |
1da177e4 | 371 | |
d550d98d | 372 | return status; |
1da177e4 LT |
373 | } |
374 | ||
375 | static int | |
4be44fcd | 376 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 377 | { |
24450c7a | 378 | int status; |
9e6dada9 | 379 | int state; |
1da177e4 | 380 | |
0db98202 JL |
381 | status = acpi_execute_simple_method(device->dev->handle, |
382 | "_BCM", level); | |
24450c7a ZR |
383 | if (ACPI_FAILURE(status)) { |
384 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
385 | return -EIO; | |
386 | } | |
387 | ||
4500ca8e | 388 | device->brightness->curr = level; |
9e6dada9 | 389 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 390 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
391 | if (device->backlight) |
392 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
393 | return 0; |
394 | } | |
9e6dada9 | 395 | |
24450c7a ZR |
396 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
397 | return -EINVAL; | |
1da177e4 LT |
398 | } |
399 | ||
45cb50e6 ZR |
400 | /* |
401 | * For some buggy _BQC methods, we need to add a constant value to | |
402 | * the _BQC return value to get the actual current brightness level | |
403 | */ | |
404 | ||
405 | static int bqc_offset_aml_bug_workaround; | |
406 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
407 | { | |
408 | bqc_offset_aml_bug_workaround = 9; | |
409 | return 0; | |
410 | } | |
411 | ||
0e9f81d3 AL |
412 | static int __init video_set_use_native_backlight(const struct dmi_system_id *d) |
413 | { | |
414 | use_native_backlight_dmi = true; | |
415 | return 0; | |
416 | } | |
417 | ||
45cb50e6 ZR |
418 | static struct dmi_system_id video_dmi_table[] __initdata = { |
419 | /* | |
420 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
421 | */ | |
422 | { | |
423 | .callback = video_set_bqc_offset, | |
424 | .ident = "Acer Aspire 5720", | |
425 | .matches = { | |
426 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
427 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
428 | }, | |
429 | }, | |
5afc4abe LB |
430 | { |
431 | .callback = video_set_bqc_offset, | |
432 | .ident = "Acer Aspire 5710Z", | |
433 | .matches = { | |
434 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
435 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
436 | }, | |
437 | }, | |
34ac272b ZR |
438 | { |
439 | .callback = video_set_bqc_offset, | |
440 | .ident = "eMachines E510", | |
441 | .matches = { | |
442 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
443 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
444 | }, | |
445 | }, | |
93bcece2 ZR |
446 | { |
447 | .callback = video_set_bqc_offset, | |
448 | .ident = "Acer Aspire 5315", | |
449 | .matches = { | |
450 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
451 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
452 | }, | |
453 | }, | |
152a4e63 ZR |
454 | { |
455 | .callback = video_set_bqc_offset, | |
456 | .ident = "Acer Aspire 7720", | |
457 | .matches = { | |
458 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
459 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
460 | }, | |
461 | }, | |
0e9f81d3 AL |
462 | { |
463 | .callback = video_set_use_native_backlight, | |
43d94902 | 464 | .ident = "ThinkPad T430 and T430s", |
0e9f81d3 AL |
465 | .matches = { |
466 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
43d94902 | 467 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"), |
0e9f81d3 AL |
468 | }, |
469 | }, | |
470 | { | |
471 | .callback = video_set_use_native_backlight, | |
472 | .ident = "ThinkPad X230", | |
473 | .matches = { | |
474 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
475 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"), | |
476 | }, | |
477 | }, | |
1e815db6 HG |
478 | { |
479 | .callback = video_set_use_native_backlight, | |
480 | .ident = "ThinkPad W530", | |
481 | .matches = { | |
482 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
483 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"), | |
484 | }, | |
485 | }, | |
43d94902 HG |
486 | { |
487 | .callback = video_set_use_native_backlight, | |
0e9f81d3 AL |
488 | .ident = "ThinkPad X1 Carbon", |
489 | .matches = { | |
490 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
491 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"), | |
492 | }, | |
493 | }, | |
494 | { | |
495 | .callback = video_set_use_native_backlight, | |
496 | .ident = "Lenovo Yoga 13", | |
497 | .matches = { | |
498 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
499 | DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), | |
500 | }, | |
501 | }, | |
0dc6b96a HG |
502 | { |
503 | .callback = video_set_use_native_backlight, | |
504 | .ident = "Lenovo Yoga 2 11", | |
505 | .matches = { | |
506 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
507 | DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2 11"), | |
508 | }, | |
509 | }, | |
997dd7fe SCP |
510 | { |
511 | .callback = video_set_use_native_backlight, | |
512 | .ident = "Thinkpad Helix", | |
513 | .matches = { | |
514 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
515 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), | |
516 | }, | |
517 | }, | |
0e9f81d3 AL |
518 | { |
519 | .callback = video_set_use_native_backlight, | |
520 | .ident = "Dell Inspiron 7520", | |
521 | .matches = { | |
522 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
5ff365fb | 523 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"), |
0e9f81d3 AL |
524 | }, |
525 | }, | |
526 | { | |
527 | .callback = video_set_use_native_backlight, | |
528 | .ident = "Acer Aspire 5733Z", | |
529 | .matches = { | |
530 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
531 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"), | |
532 | }, | |
533 | }, | |
43d94902 HG |
534 | { |
535 | .callback = video_set_use_native_backlight, | |
536 | .ident = "Acer Aspire 5742G", | |
537 | .matches = { | |
538 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
539 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"), | |
540 | }, | |
541 | }, | |
0dc6b96a HG |
542 | { |
543 | .callback = video_set_use_native_backlight, | |
544 | .ident = "Acer Aspire V5-171", | |
545 | .matches = { | |
546 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
547 | DMI_MATCH(DMI_PRODUCT_NAME, "V5-171"), | |
548 | }, | |
549 | }, | |
0e9f81d3 AL |
550 | { |
551 | .callback = video_set_use_native_backlight, | |
552 | .ident = "Acer Aspire V5-431", | |
553 | .matches = { | |
554 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
555 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"), | |
556 | }, | |
557 | }, | |
0dc6b96a HG |
558 | { |
559 | .callback = video_set_use_native_backlight, | |
560 | .ident = "Acer Aspire V5-471G", | |
561 | .matches = { | |
562 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
563 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-471G"), | |
564 | }, | |
565 | }, | |
ab7027de MK |
566 | { |
567 | .callback = video_set_use_native_backlight, | |
568 | .ident = "Acer TravelMate B113", | |
569 | .matches = { | |
570 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
571 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate B113"), | |
572 | }, | |
573 | }, | |
0e9f81d3 AL |
574 | { |
575 | .callback = video_set_use_native_backlight, | |
576 | .ident = "HP ProBook 4340s", | |
577 | .matches = { | |
578 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
579 | DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"), | |
580 | }, | |
581 | }, | |
582 | { | |
583 | .callback = video_set_use_native_backlight, | |
584 | .ident = "HP ProBook 2013 models", | |
585 | .matches = { | |
586 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
587 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "), | |
588 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
589 | }, | |
590 | }, | |
591 | { | |
592 | .callback = video_set_use_native_backlight, | |
593 | .ident = "HP EliteBook 2013 models", | |
594 | .matches = { | |
595 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
596 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "), | |
597 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
598 | }, | |
599 | }, | |
600 | { | |
601 | .callback = video_set_use_native_backlight, | |
602 | .ident = "HP ZBook 14", | |
603 | .matches = { | |
604 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
605 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"), | |
606 | }, | |
607 | }, | |
608 | { | |
609 | .callback = video_set_use_native_backlight, | |
610 | .ident = "HP ZBook 15", | |
611 | .matches = { | |
612 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
613 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"), | |
614 | }, | |
615 | }, | |
616 | { | |
617 | .callback = video_set_use_native_backlight, | |
618 | .ident = "HP ZBook 17", | |
619 | .matches = { | |
620 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
621 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"), | |
622 | }, | |
623 | }, | |
624 | { | |
625 | .callback = video_set_use_native_backlight, | |
0dc6b96a HG |
626 | .ident = "HP EliteBook 8470p", |
627 | .matches = { | |
628 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
629 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8470p"), | |
630 | }, | |
631 | }, | |
632 | { | |
633 | .callback = video_set_use_native_backlight, | |
0e9f81d3 AL |
634 | .ident = "HP EliteBook 8780w", |
635 | .matches = { | |
636 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
637 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"), | |
638 | }, | |
639 | }, | |
45cb50e6 ZR |
640 | {} |
641 | }; | |
642 | ||
994fa63c DB |
643 | static unsigned long long |
644 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
645 | unsigned long long bqc_value) | |
646 | { | |
647 | unsigned long long level; | |
648 | ||
649 | if (device->brightness->flags._BQC_use_index) { | |
650 | /* | |
651 | * _BQC returns an index that doesn't account for | |
652 | * the first 2 items with special meaning, so we need | |
653 | * to compensate for that by offsetting ourselves | |
654 | */ | |
655 | if (device->brightness->flags._BCL_reversed) | |
656 | bqc_value = device->brightness->count - 3 - bqc_value; | |
657 | ||
658 | level = device->brightness->levels[bqc_value + 2]; | |
659 | } else { | |
660 | level = bqc_value; | |
661 | } | |
662 | ||
663 | level += bqc_offset_aml_bug_workaround; | |
664 | ||
665 | return level; | |
666 | } | |
667 | ||
1da177e4 | 668 | static int |
4be44fcd | 669 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 670 | unsigned long long *level, bool raw) |
1da177e4 | 671 | { |
c8890f90 | 672 | acpi_status status = AE_OK; |
4e231fa4 | 673 | int i; |
c8890f90 | 674 | |
c60d638e ZR |
675 | if (device->cap._BQC || device->cap._BCQ) { |
676 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
677 | ||
678 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
679 | NULL, level); |
680 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
681 | if (raw) { |
682 | /* | |
683 | * Caller has indicated he wants the raw | |
684 | * value returned by _BQC, so don't furtherly | |
685 | * mess with the value. | |
686 | */ | |
687 | return 0; | |
688 | } | |
689 | ||
994fa63c | 690 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 691 | |
4e231fa4 VS |
692 | for (i = 2; i < device->brightness->count; i++) |
693 | if (device->brightness->levels[i] == *level) { | |
694 | device->brightness->curr = *level; | |
695 | return 0; | |
915ea7e4 | 696 | } |
a89803df DB |
697 | /* |
698 | * BQC returned an invalid level. | |
699 | * Stop using it. | |
700 | */ | |
701 | ACPI_WARNING((AE_INFO, | |
702 | "%s returned an invalid level", | |
703 | buf)); | |
704 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 705 | } else { |
21fcb34e FC |
706 | /* |
707 | * Fixme: | |
c8890f90 ZR |
708 | * should we return an error or ignore this failure? |
709 | * dev->brightness->curr is a cached value which stores | |
710 | * the correct current backlight level in most cases. | |
711 | * ACPI video backlight still works w/ buggy _BQC. | |
712 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
713 | */ | |
c60d638e ZR |
714 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
715 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
716 | } |
717 | } | |
718 | ||
4500ca8e | 719 | *level = device->brightness->curr; |
c8890f90 | 720 | return 0; |
1da177e4 LT |
721 | } |
722 | ||
723 | static int | |
4be44fcd LB |
724 | acpi_video_device_EDID(struct acpi_video_device *device, |
725 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 726 | { |
4be44fcd LB |
727 | int status; |
728 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
729 | union acpi_object *obj; | |
730 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
731 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 732 | |
1da177e4 LT |
733 | |
734 | *edid = NULL; | |
735 | ||
736 | if (!device) | |
d550d98d | 737 | return -ENODEV; |
1da177e4 LT |
738 | if (length == 128) |
739 | arg0.integer.value = 1; | |
740 | else if (length == 256) | |
741 | arg0.integer.value = 2; | |
742 | else | |
d550d98d | 743 | return -EINVAL; |
1da177e4 | 744 | |
90130268 | 745 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 746 | if (ACPI_FAILURE(status)) |
d550d98d | 747 | return -ENODEV; |
1da177e4 | 748 | |
50dd0969 | 749 | obj = buffer.pointer; |
1da177e4 LT |
750 | |
751 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
752 | *edid = obj; | |
753 | else { | |
6468463a | 754 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
755 | status = -EFAULT; |
756 | kfree(obj); | |
757 | } | |
758 | ||
d550d98d | 759 | return status; |
1da177e4 LT |
760 | } |
761 | ||
1da177e4 LT |
762 | /* bus */ |
763 | ||
1da177e4 LT |
764 | /* |
765 | * Arg: | |
21fcb34e FC |
766 | * video : video bus device pointer |
767 | * bios_flag : | |
1da177e4 LT |
768 | * 0. The system BIOS should NOT automatically switch(toggle) |
769 | * the active display output. | |
770 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 771 | * active display output. No switch event. |
1da177e4 LT |
772 | * 2. The _DGS value should be locked. |
773 | * 3. The system BIOS should not automatically switch (toggle) the | |
774 | * active display output, but instead generate the display switch | |
775 | * event notify code. | |
776 | * lcd_flag : | |
777 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 778 | * of the LCD when the power changes from AC to DC |
21fcb34e | 779 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 780 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 781 | * Return Value: |
ea9f8856 | 782 | * -EINVAL wrong arg. |
1da177e4 LT |
783 | */ |
784 | ||
785 | static int | |
4be44fcd | 786 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 787 | { |
ea9f8856 | 788 | acpi_status status; |
1da177e4 | 789 | |
b0373843 ZR |
790 | if (!video->cap._DOS) |
791 | return 0; | |
1da177e4 | 792 | |
ea9f8856 IM |
793 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
794 | return -EINVAL; | |
0db98202 JL |
795 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
796 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
797 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
798 | if (ACPI_FAILURE(status)) |
799 | return -EIO; | |
1da177e4 | 800 | |
ea9f8856 | 801 | return 0; |
1da177e4 LT |
802 | } |
803 | ||
935e5f29 ZR |
804 | /* |
805 | * Simple comparison function used to sort backlight levels. | |
806 | */ | |
807 | ||
808 | static int | |
809 | acpi_video_cmp_level(const void *a, const void *b) | |
810 | { | |
811 | return *(int *)a - *(int *)b; | |
812 | } | |
813 | ||
a50188da AL |
814 | /* |
815 | * Decides if _BQC/_BCQ for this system is usable | |
816 | * | |
817 | * We do this by changing the level first and then read out the current | |
818 | * brightness level, if the value does not match, find out if it is using | |
819 | * index. If not, clear the _BQC/_BCQ capability. | |
820 | */ | |
821 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
822 | int max_level, int current_level) | |
823 | { | |
824 | struct acpi_video_device_brightness *br = device->brightness; | |
825 | int result; | |
826 | unsigned long long level; | |
827 | int test_level; | |
828 | ||
829 | /* don't mess with existing known broken systems */ | |
830 | if (bqc_offset_aml_bug_workaround) | |
831 | return 0; | |
832 | ||
833 | /* | |
834 | * Some systems always report current brightness level as maximum | |
835 | * through _BQC, we need to test another value for them. | |
836 | */ | |
b3b301c5 | 837 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
838 | |
839 | result = acpi_video_device_lcd_set_level(device, test_level); | |
840 | if (result) | |
841 | return result; | |
842 | ||
843 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
844 | if (result) | |
845 | return result; | |
846 | ||
847 | if (level != test_level) { | |
848 | /* buggy _BQC found, need to find out if it uses index */ | |
849 | if (level < br->count) { | |
850 | if (br->flags._BCL_reversed) | |
851 | level = br->count - 3 - level; | |
852 | if (br->levels[level + 2] == test_level) | |
853 | br->flags._BQC_use_index = 1; | |
854 | } | |
855 | ||
856 | if (!br->flags._BQC_use_index) | |
857 | device->cap._BQC = device->cap._BCQ = 0; | |
858 | } | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | ||
1da177e4 | 864 | /* |
21fcb34e FC |
865 | * Arg: |
866 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
867 | * |
868 | * Return Value: | |
469778c1 JJ |
869 | * Maximum brightness level |
870 | * | |
871 | * Allocate and initialize device->brightness. | |
872 | */ | |
873 | ||
874 | static int | |
875 | acpi_video_init_brightness(struct acpi_video_device *device) | |
876 | { | |
877 | union acpi_object *obj = NULL; | |
d32f6947 | 878 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 879 | unsigned long long level, level_old; |
469778c1 JJ |
880 | union acpi_object *o; |
881 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 882 | int result = -EINVAL; |
bd8ba205 | 883 | u32 value; |
469778c1 JJ |
884 | |
885 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
886 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
887 | "LCD brightness level\n")); | |
888 | goto out; | |
889 | } | |
890 | ||
891 | if (obj->package.count < 2) | |
892 | goto out; | |
893 | ||
894 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
895 | if (!br) { | |
896 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 897 | result = -ENOMEM; |
469778c1 JJ |
898 | goto out; |
899 | } | |
900 | ||
d32f6947 | 901 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 902 | GFP_KERNEL); |
1a7c618a ZR |
903 | if (!br->levels) { |
904 | result = -ENOMEM; | |
469778c1 | 905 | goto out_free; |
1a7c618a | 906 | } |
469778c1 JJ |
907 | |
908 | for (i = 0; i < obj->package.count; i++) { | |
909 | o = (union acpi_object *)&obj->package.elements[i]; | |
910 | if (o->type != ACPI_TYPE_INTEGER) { | |
911 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
912 | continue; | |
913 | } | |
bd8ba205 HG |
914 | value = (u32) o->integer.value; |
915 | /* Skip duplicate entries */ | |
916 | if (count > 2 && br->levels[count - 1] == value) | |
917 | continue; | |
918 | ||
919 | br->levels[count] = value; | |
469778c1 JJ |
920 | |
921 | if (br->levels[count] > max_level) | |
922 | max_level = br->levels[count]; | |
923 | count++; | |
924 | } | |
925 | ||
d32f6947 ZR |
926 | /* |
927 | * some buggy BIOS don't export the levels | |
928 | * when machine is on AC/Battery in _BCL package. | |
929 | * In this case, the first two elements in _BCL packages | |
930 | * are also supported brightness levels that OS should take care of. | |
931 | */ | |
90af2cf6 ZR |
932 | for (i = 2; i < count; i++) { |
933 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 934 | level_ac_battery++; |
90af2cf6 ZR |
935 | if (br->levels[i] == br->levels[1]) |
936 | level_ac_battery++; | |
937 | } | |
d32f6947 ZR |
938 | |
939 | if (level_ac_battery < 2) { | |
940 | level_ac_battery = 2 - level_ac_battery; | |
941 | br->flags._BCL_no_ac_battery_levels = 1; | |
942 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
943 | br->levels[i] = br->levels[i - level_ac_battery]; | |
944 | count += level_ac_battery; | |
945 | } else if (level_ac_battery > 2) | |
bf6787eb | 946 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 947 | |
d80fb99f ZR |
948 | /* Check if the _BCL package is in a reversed order */ |
949 | if (max_level == br->levels[2]) { | |
950 | br->flags._BCL_reversed = 1; | |
951 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
952 | acpi_video_cmp_level, NULL); | |
953 | } else if (max_level != br->levels[count - 1]) | |
954 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 955 | "Found unordered _BCL package")); |
469778c1 JJ |
956 | |
957 | br->count = count; | |
958 | device->brightness = br; | |
1a7c618a | 959 | |
1a7c618a | 960 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 961 | br->curr = level = max_level; |
e047cca6 ZR |
962 | |
963 | if (!device->cap._BQC) | |
964 | goto set_level; | |
965 | ||
a89803df DB |
966 | result = acpi_video_device_lcd_get_level_current(device, |
967 | &level_old, true); | |
1a7c618a ZR |
968 | if (result) |
969 | goto out_free_levels; | |
970 | ||
a50188da | 971 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
972 | if (result) |
973 | goto out_free_levels; | |
a50188da AL |
974 | /* |
975 | * cap._BQC may get cleared due to _BQC is found to be broken | |
976 | * in acpi_video_bqc_quirk, so check again here. | |
977 | */ | |
978 | if (!device->cap._BQC) | |
979 | goto set_level; | |
e047cca6 | 980 | |
545ef368 AL |
981 | level = acpi_video_bqc_value_to_level(device, level_old); |
982 | /* | |
983 | * On some buggy laptops, _BQC returns an uninitialized | |
984 | * value when invoked for the first time, i.e. | |
985 | * level_old is invalid (no matter whether it's a level | |
986 | * or an index). Set the backlight to max_level in this case. | |
987 | */ | |
988 | for (i = 2; i < br->count; i++) | |
989 | if (level == br->levels[i]) | |
990 | break; | |
991 | if (i == br->count || !level) | |
992 | level = max_level; | |
e047cca6 | 993 | |
e047cca6 | 994 | set_level: |
90c53ca4 | 995 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
996 | if (result) |
997 | goto out_free_levels; | |
1a7c618a | 998 | |
d32f6947 ZR |
999 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1000 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 1001 | kfree(obj); |
1a7c618a | 1002 | return result; |
469778c1 JJ |
1003 | |
1004 | out_free_levels: | |
1005 | kfree(br->levels); | |
1006 | out_free: | |
1007 | kfree(br); | |
1008 | out: | |
1009 | device->brightness = NULL; | |
1010 | kfree(obj); | |
1a7c618a | 1011 | return result; |
469778c1 JJ |
1012 | } |
1013 | ||
1014 | /* | |
1015 | * Arg: | |
1016 | * device : video output device (LCD, CRT, ..) | |
1017 | * | |
1018 | * Return Value: | |
21fcb34e | 1019 | * None |
1da177e4 | 1020 | * |
98fb8fe1 | 1021 | * Find out all required AML methods defined under the output |
1da177e4 LT |
1022 | * device. |
1023 | */ | |
1024 | ||
4be44fcd | 1025 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 1026 | { |
952c63e9 | 1027 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 1028 | device->cap._ADR = 1; |
952c63e9 | 1029 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 1030 | device->cap._BCL = 1; |
952c63e9 | 1031 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 1032 | device->cap._BCM = 1; |
952c63e9 | 1033 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 1034 | device->cap._BQC = 1; |
952c63e9 | 1035 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
1036 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
1037 | device->cap._BCQ = 1; | |
1038 | } | |
1039 | ||
952c63e9 | 1040 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 1041 | device->cap._DDC = 1; |
1da177e4 LT |
1042 | } |
1043 | ||
1044 | /* | |
21fcb34e FC |
1045 | * Arg: |
1046 | * device : video output device (VGA) | |
1da177e4 LT |
1047 | * |
1048 | * Return Value: | |
21fcb34e | 1049 | * None |
1da177e4 | 1050 | * |
98fb8fe1 | 1051 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1052 | */ |
1053 | ||
4be44fcd | 1054 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1055 | { |
952c63e9 | 1056 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1057 | video->cap._DOS = 1; |
952c63e9 | 1058 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1059 | video->cap._DOD = 1; |
952c63e9 | 1060 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1061 | video->cap._ROM = 1; |
952c63e9 | 1062 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1063 | video->cap._GPD = 1; |
952c63e9 | 1064 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1065 | video->cap._SPD = 1; |
952c63e9 | 1066 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1067 | video->cap._VPO = 1; |
1da177e4 LT |
1068 | } |
1069 | ||
1070 | /* | |
1071 | * Check whether the video bus device has required AML method to | |
1072 | * support the desired features | |
1073 | */ | |
1074 | ||
4be44fcd | 1075 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1076 | { |
4be44fcd | 1077 | acpi_status status = -ENOENT; |
1e4cffe7 | 1078 | struct pci_dev *dev; |
1da177e4 LT |
1079 | |
1080 | if (!video) | |
d550d98d | 1081 | return -EINVAL; |
1da177e4 | 1082 | |
1e4cffe7 | 1083 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1084 | if (!dev) |
1085 | return -ENODEV; | |
1e4cffe7 | 1086 | pci_dev_put(dev); |
22c13f9d | 1087 | |
21fcb34e FC |
1088 | /* |
1089 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1090 | * to check well known required nodes. |
1091 | */ | |
1092 | ||
98fb8fe1 | 1093 | /* Does this device support video switching? */ |
3a1151e3 SB |
1094 | if (video->cap._DOS || video->cap._DOD) { |
1095 | if (!video->cap._DOS) { | |
1096 | printk(KERN_WARNING FW_BUG | |
1097 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1098 | acpi_device_bid(video->device)); | |
1099 | } | |
1da177e4 LT |
1100 | video->flags.multihead = 1; |
1101 | status = 0; | |
1102 | } | |
1103 | ||
98fb8fe1 | 1104 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1105 | if (video->cap._ROM) { |
1da177e4 LT |
1106 | video->flags.rom = 1; |
1107 | status = 0; | |
1108 | } | |
1109 | ||
98fb8fe1 | 1110 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1111 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1112 | video->flags.post = 1; |
1113 | status = 0; | |
1114 | } | |
1115 | ||
d550d98d | 1116 | return status; |
1da177e4 LT |
1117 | } |
1118 | ||
21fcb34e FC |
1119 | /* |
1120 | * -------------------------------------------------------------------------- | |
1121 | * Driver Interface | |
1122 | * -------------------------------------------------------------------------- | |
1123 | */ | |
1da177e4 LT |
1124 | |
1125 | /* device interface */ | |
915ea7e4 | 1126 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1127 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1128 | { | |
78eed028 DT |
1129 | struct acpi_video_enumerated_device *ids; |
1130 | int i; | |
1131 | ||
1132 | for (i = 0; i < video->attached_count; i++) { | |
1133 | ids = &video->attached_array[i]; | |
1134 | if ((ids->value.int_val & 0xffff) == device_id) | |
1135 | return &ids->value.attrib; | |
1136 | } | |
82cae999 | 1137 | |
82cae999 RZ |
1138 | return NULL; |
1139 | } | |
1da177e4 | 1140 | |
e92a7162 MG |
1141 | static int |
1142 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1143 | unsigned long device_id) | |
1144 | { | |
1145 | struct acpi_video_enumerated_device *ids; | |
1146 | int i; | |
1147 | ||
1148 | for (i = 0; i < video->attached_count; i++) { | |
1149 | ids = &video->attached_array[i]; | |
1150 | if ((ids->value.int_val & 0xffff) == device_id) | |
1151 | return ids->value.int_val; | |
1152 | } | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
1da177e4 | 1157 | static int |
4be44fcd LB |
1158 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1159 | struct acpi_video_bus *video) | |
1da177e4 | 1160 | { |
27663c58 | 1161 | unsigned long long device_id; |
e92a7162 | 1162 | int status, device_type; |
4be44fcd | 1163 | struct acpi_video_device *data; |
915ea7e4 | 1164 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1165 | |
4be44fcd LB |
1166 | status = |
1167 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1168 | /* Some device omits _ADR, we skip them instead of fail */ |
1169 | if (ACPI_FAILURE(status)) | |
1170 | return 0; | |
1da177e4 | 1171 | |
91e13aa3 AL |
1172 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1173 | if (!data) | |
1174 | return -ENOMEM; | |
82cae999 | 1175 | |
91e13aa3 AL |
1176 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1177 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1178 | device->driver_data = data; | |
1179 | ||
1180 | data->device_id = device_id; | |
1181 | data->video = video; | |
1182 | data->dev = device; | |
1183 | ||
1184 | attribute = acpi_video_get_device_attr(video, device_id); | |
1185 | ||
915ea7e4 | 1186 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1187 | switch (attribute->display_type) { |
1188 | case ACPI_VIDEO_DISPLAY_CRT: | |
1189 | data->flags.crt = 1; | |
1190 | break; | |
1191 | case ACPI_VIDEO_DISPLAY_TV: | |
1192 | data->flags.tvout = 1; | |
1193 | break; | |
1194 | case ACPI_VIDEO_DISPLAY_DVI: | |
1195 | data->flags.dvi = 1; | |
1196 | break; | |
1197 | case ACPI_VIDEO_DISPLAY_LCD: | |
1198 | data->flags.lcd = 1; | |
1199 | break; | |
1200 | default: | |
1201 | data->flags.unknown = 1; | |
1202 | break; | |
1203 | } | |
915ea7e4 | 1204 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1205 | data->flags.bios = 1; |
1206 | } else { | |
1207 | /* Check for legacy IDs */ | |
1208 | device_type = acpi_video_get_device_type(video, device_id); | |
1209 | /* Ignore bits 16 and 18-20 */ | |
1210 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1211 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1212 | data->flags.crt = 1; | |
1213 | break; | |
1214 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1215 | data->flags.lcd = 1; | |
1216 | break; | |
1217 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1218 | data->flags.tvout = 1; | |
1219 | break; | |
1220 | default: | |
1221 | data->flags.unknown = 1; | |
e92a7162 | 1222 | } |
91e13aa3 | 1223 | } |
4be44fcd | 1224 | |
91e13aa3 AL |
1225 | acpi_video_device_bind(video, data); |
1226 | acpi_video_device_find_cap(data); | |
1da177e4 | 1227 | |
91e13aa3 AL |
1228 | mutex_lock(&video->device_list_lock); |
1229 | list_add_tail(&data->entry, &video->video_device_list); | |
1230 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1231 | |
91e13aa3 | 1232 | return status; |
1da177e4 LT |
1233 | } |
1234 | ||
1235 | /* | |
1236 | * Arg: | |
21fcb34e | 1237 | * video : video bus device |
1da177e4 LT |
1238 | * |
1239 | * Return: | |
21fcb34e FC |
1240 | * none |
1241 | * | |
1242 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1243 | * bind the ids with the corresponding video devices |
1244 | * under the video bus. | |
4be44fcd | 1245 | */ |
1da177e4 | 1246 | |
4be44fcd | 1247 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1248 | { |
ff102ea9 DT |
1249 | struct acpi_video_device *dev; |
1250 | ||
bbac81f5 | 1251 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1252 | |
1253 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1254 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1255 | |
bbac81f5 | 1256 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | /* | |
1260 | * Arg: | |
21fcb34e FC |
1261 | * video : video bus device |
1262 | * device : video output device under the video | |
1263 | * bus | |
1da177e4 LT |
1264 | * |
1265 | * Return: | |
21fcb34e FC |
1266 | * none |
1267 | * | |
1da177e4 LT |
1268 | * Bind the ids with the corresponding video devices |
1269 | * under the video bus. | |
4be44fcd | 1270 | */ |
1da177e4 LT |
1271 | |
1272 | static void | |
4be44fcd LB |
1273 | acpi_video_device_bind(struct acpi_video_bus *video, |
1274 | struct acpi_video_device *device) | |
1da177e4 | 1275 | { |
78eed028 | 1276 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1277 | int i; |
1da177e4 | 1278 | |
78eed028 DT |
1279 | for (i = 0; i < video->attached_count; i++) { |
1280 | ids = &video->attached_array[i]; | |
1281 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1282 | ids->bind_info = device; | |
1da177e4 LT |
1283 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1284 | } | |
1285 | } | |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | /* | |
1289 | * Arg: | |
21fcb34e | 1290 | * video : video bus device |
1da177e4 LT |
1291 | * |
1292 | * Return: | |
21fcb34e FC |
1293 | * < 0 : error |
1294 | * | |
1da177e4 LT |
1295 | * Call _DOD to enumerate all devices attached to display adapter |
1296 | * | |
4be44fcd | 1297 | */ |
1da177e4 LT |
1298 | |
1299 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1300 | { | |
4be44fcd LB |
1301 | int status; |
1302 | int count; | |
1303 | int i; | |
78eed028 | 1304 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1305 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1306 | union acpi_object *dod = NULL; | |
1307 | union acpi_object *obj; | |
1da177e4 | 1308 | |
90130268 | 1309 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1310 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1311 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1312 | return status; |
1da177e4 LT |
1313 | } |
1314 | ||
50dd0969 | 1315 | dod = buffer.pointer; |
1da177e4 | 1316 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1317 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1318 | status = -EFAULT; |
1319 | goto out; | |
1320 | } | |
1321 | ||
1322 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1323 | dod->package.count)); |
1da177e4 | 1324 | |
78eed028 DT |
1325 | active_list = kcalloc(1 + dod->package.count, |
1326 | sizeof(struct acpi_video_enumerated_device), | |
1327 | GFP_KERNEL); | |
1328 | if (!active_list) { | |
1da177e4 LT |
1329 | status = -ENOMEM; |
1330 | goto out; | |
1331 | } | |
1332 | ||
1333 | count = 0; | |
1334 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1335 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1336 | |
1337 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1338 | printk(KERN_ERR PREFIX |
1339 | "Invalid _DOD data in element %d\n", i); | |
1340 | continue; | |
1da177e4 | 1341 | } |
78eed028 DT |
1342 | |
1343 | active_list[count].value.int_val = obj->integer.value; | |
1344 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1345 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1346 | (int)obj->integer.value)); | |
1da177e4 LT |
1347 | count++; |
1348 | } | |
1da177e4 | 1349 | |
6044ec88 | 1350 | kfree(video->attached_array); |
4be44fcd | 1351 | |
78eed028 | 1352 | video->attached_array = active_list; |
1da177e4 | 1353 | video->attached_count = count; |
78eed028 | 1354 | |
915ea7e4 | 1355 | out: |
02438d87 | 1356 | kfree(buffer.pointer); |
d550d98d | 1357 | return status; |
1da177e4 LT |
1358 | } |
1359 | ||
4be44fcd LB |
1360 | static int |
1361 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1362 | u32 level_current, u32 event) | |
1da177e4 | 1363 | { |
63f0edfc | 1364 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1365 | max = max_below = 0; |
1366 | min = min_above = 255; | |
63f0edfc | 1367 | /* Find closest level to level_current */ |
0a3db1ce | 1368 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1369 | l = device->brightness->levels[i]; |
1370 | if (abs(l - level_current) < abs(delta)) { | |
1371 | delta = l - level_current; | |
1372 | if (!delta) | |
1373 | break; | |
1374 | } | |
1375 | } | |
1376 | /* Ajust level_current to closest available level */ | |
1377 | level_current += delta; | |
0a3db1ce | 1378 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1379 | l = device->brightness->levels[i]; |
1380 | if (l < min) | |
1381 | min = l; | |
1382 | if (l > max) | |
1383 | max = l; | |
1384 | if (l < min_above && l > level_current) | |
1385 | min_above = l; | |
1386 | if (l > max_below && l < level_current) | |
1387 | max_below = l; | |
1388 | } | |
1389 | ||
1390 | switch (event) { | |
1391 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1392 | return (level_current < max) ? min_above : min; | |
1393 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1394 | return (level_current < max) ? min_above : max; | |
1395 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1396 | return (level_current > min) ? max_below : min; | |
1397 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1398 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1399 | return 0; | |
1400 | default: | |
1401 | return level_current; | |
1402 | } | |
1da177e4 LT |
1403 | } |
1404 | ||
c8890f90 | 1405 | static int |
4be44fcd | 1406 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1407 | { |
27663c58 | 1408 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1409 | int result = -EINVAL; |
1410 | ||
fbc9fe1b AL |
1411 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1412 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1413 | return 0; |
1414 | ||
469778c1 | 1415 | if (!device->brightness) |
c8890f90 ZR |
1416 | goto out; |
1417 | ||
1418 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1419 | &level_current, |
1420 | false); | |
c8890f90 ZR |
1421 | if (result) |
1422 | goto out; | |
1423 | ||
1da177e4 | 1424 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1425 | |
24450c7a | 1426 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1427 | |
36342742 MG |
1428 | if (!result) |
1429 | backlight_force_update(device->backlight, | |
1430 | BACKLIGHT_UPDATE_HOTKEY); | |
1431 | ||
c8890f90 ZR |
1432 | out: |
1433 | if (result) | |
1434 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1435 | ||
1436 | return result; | |
1da177e4 LT |
1437 | } |
1438 | ||
e92a7162 MG |
1439 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1440 | void **edid) | |
1441 | { | |
1442 | struct acpi_video_bus *video; | |
1443 | struct acpi_video_device *video_device; | |
1444 | union acpi_object *buffer = NULL; | |
1445 | acpi_status status; | |
1446 | int i, length; | |
1447 | ||
1448 | if (!device || !acpi_driver_data(device)) | |
1449 | return -EINVAL; | |
1450 | ||
1451 | video = acpi_driver_data(device); | |
1452 | ||
1453 | for (i = 0; i < video->attached_count; i++) { | |
1454 | video_device = video->attached_array[i].bind_info; | |
1455 | length = 256; | |
1456 | ||
1457 | if (!video_device) | |
1458 | continue; | |
1459 | ||
82069552 ZR |
1460 | if (!video_device->cap._DDC) |
1461 | continue; | |
1462 | ||
e92a7162 MG |
1463 | if (type) { |
1464 | switch (type) { | |
1465 | case ACPI_VIDEO_DISPLAY_CRT: | |
1466 | if (!video_device->flags.crt) | |
1467 | continue; | |
1468 | break; | |
1469 | case ACPI_VIDEO_DISPLAY_TV: | |
1470 | if (!video_device->flags.tvout) | |
1471 | continue; | |
1472 | break; | |
1473 | case ACPI_VIDEO_DISPLAY_DVI: | |
1474 | if (!video_device->flags.dvi) | |
1475 | continue; | |
1476 | break; | |
1477 | case ACPI_VIDEO_DISPLAY_LCD: | |
1478 | if (!video_device->flags.lcd) | |
1479 | continue; | |
1480 | break; | |
1481 | } | |
1482 | } else if (video_device->device_id != device_id) { | |
1483 | continue; | |
1484 | } | |
1485 | ||
1486 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1487 | ||
1488 | if (ACPI_FAILURE(status) || !buffer || | |
1489 | buffer->type != ACPI_TYPE_BUFFER) { | |
1490 | length = 128; | |
1491 | status = acpi_video_device_EDID(video_device, &buffer, | |
1492 | length); | |
1493 | if (ACPI_FAILURE(status) || !buffer || | |
1494 | buffer->type != ACPI_TYPE_BUFFER) { | |
1495 | continue; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | *edid = buffer->buffer.pointer; | |
1500 | return length; | |
1501 | } | |
1502 | ||
1503 | return -ENODEV; | |
1504 | } | |
1505 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1506 | ||
1da177e4 | 1507 | static int |
4be44fcd LB |
1508 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1509 | struct acpi_device *device) | |
1da177e4 | 1510 | { |
fba4e087 | 1511 | int status = 0; |
ff102ea9 | 1512 | struct acpi_device *dev; |
1da177e4 | 1513 | |
fba4e087 IM |
1514 | /* |
1515 | * There are systems where video module known to work fine regardless | |
1516 | * of broken _DOD and ignoring returned value here doesn't cause | |
1517 | * any issues later. | |
1518 | */ | |
1519 | acpi_video_device_enumerate(video); | |
1da177e4 | 1520 | |
ff102ea9 | 1521 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1522 | |
1523 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1524 | if (status) { |
91e13aa3 AL |
1525 | dev_err(&dev->dev, "Can't attach device\n"); |
1526 | break; | |
1da177e4 | 1527 | } |
1da177e4 | 1528 | } |
d550d98d | 1529 | return status; |
1da177e4 LT |
1530 | } |
1531 | ||
1da177e4 LT |
1532 | /* acpi_video interface */ |
1533 | ||
efaa14c7 AL |
1534 | /* |
1535 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1536 | * preform any automatic brightness change on receiving a notification. | |
1537 | */ | |
4be44fcd | 1538 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1539 | { |
efaa14c7 | 1540 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1541 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1542 | } |
1543 | ||
4be44fcd | 1544 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1545 | { |
efaa14c7 | 1546 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1547 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1548 | } |
1549 | ||
7015558f | 1550 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1551 | { |
7015558f | 1552 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1553 | struct input_dev *input; |
17c452f9 | 1554 | int keycode = 0; |
e9dab196 | 1555 | |
67b662e1 | 1556 | if (!video || !video->input) |
d550d98d | 1557 | return; |
1da177e4 | 1558 | |
e9dab196 | 1559 | input = video->input; |
1da177e4 LT |
1560 | |
1561 | switch (event) { | |
98fb8fe1 | 1562 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1563 | * most likely via hotkey. */ |
8a37c65d | 1564 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1565 | break; |
1566 | ||
98fb8fe1 | 1567 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1568 | * connector. */ |
1569 | acpi_video_device_enumerate(video); | |
1570 | acpi_video_device_rebind(video); | |
e9dab196 | 1571 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1572 | break; |
1573 | ||
4be44fcd | 1574 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1575 | keycode = KEY_SWITCHVIDEOMODE; |
1576 | break; | |
4be44fcd | 1577 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1578 | keycode = KEY_VIDEO_NEXT; |
1579 | break; | |
4be44fcd | 1580 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1581 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1582 | break; |
1583 | ||
1584 | default: | |
1585 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1586 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1587 | break; |
1588 | } | |
1589 | ||
8a37c65d LT |
1590 | if (acpi_notifier_call_chain(device, event, 0)) |
1591 | /* Something vetoed the keypress. */ | |
1592 | keycode = 0; | |
17c452f9 MG |
1593 | |
1594 | if (keycode) { | |
1595 | input_report_key(input, keycode, 1); | |
1596 | input_sync(input); | |
1597 | input_report_key(input, keycode, 0); | |
1598 | input_sync(input); | |
1599 | } | |
e9dab196 | 1600 | |
d550d98d | 1601 | return; |
1da177e4 LT |
1602 | } |
1603 | ||
4be44fcd | 1604 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1605 | { |
50dd0969 | 1606 | struct acpi_video_device *video_device = data; |
4be44fcd | 1607 | struct acpi_device *device = NULL; |
e9dab196 LY |
1608 | struct acpi_video_bus *bus; |
1609 | struct input_dev *input; | |
17c452f9 | 1610 | int keycode = 0; |
1da177e4 | 1611 | |
1da177e4 | 1612 | if (!video_device) |
d550d98d | 1613 | return; |
1da177e4 | 1614 | |
e6afa0de | 1615 | device = video_device->dev; |
e9dab196 LY |
1616 | bus = video_device->video; |
1617 | input = bus->input; | |
1da177e4 LT |
1618 | |
1619 | switch (event) { | |
4be44fcd | 1620 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1621 | if (brightness_switch_enabled) |
1622 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1623 | keycode = KEY_BRIGHTNESS_CYCLE; |
1624 | break; | |
4be44fcd | 1625 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1626 | if (brightness_switch_enabled) |
1627 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1628 | keycode = KEY_BRIGHTNESSUP; |
1629 | break; | |
4be44fcd | 1630 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1631 | if (brightness_switch_enabled) |
1632 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1633 | keycode = KEY_BRIGHTNESSDOWN; |
1634 | break; | |
70f23fd6 | 1635 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1636 | if (brightness_switch_enabled) |
1637 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1638 | keycode = KEY_BRIGHTNESS_ZERO; |
1639 | break; | |
4be44fcd | 1640 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1641 | if (brightness_switch_enabled) |
1642 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1643 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1644 | break; |
1645 | default: | |
1646 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1647 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1648 | break; |
1649 | } | |
e9dab196 | 1650 | |
7761f638 | 1651 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1652 | |
1653 | if (keycode) { | |
1654 | input_report_key(input, keycode, 1); | |
1655 | input_sync(input); | |
1656 | input_report_key(input, keycode, 0); | |
1657 | input_sync(input); | |
1658 | } | |
e9dab196 | 1659 | |
d550d98d | 1660 | return; |
1da177e4 LT |
1661 | } |
1662 | ||
ac7729da RW |
1663 | static int acpi_video_resume(struct notifier_block *nb, |
1664 | unsigned long val, void *ign) | |
863c1490 MG |
1665 | { |
1666 | struct acpi_video_bus *video; | |
1667 | struct acpi_video_device *video_device; | |
1668 | int i; | |
1669 | ||
ac7729da RW |
1670 | switch (val) { |
1671 | case PM_HIBERNATION_PREPARE: | |
1672 | case PM_SUSPEND_PREPARE: | |
1673 | case PM_RESTORE_PREPARE: | |
1674 | return NOTIFY_DONE; | |
1675 | } | |
863c1490 | 1676 | |
ac7729da RW |
1677 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1678 | ||
1679 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1680 | |
1681 | for (i = 0; i < video->attached_count; i++) { | |
1682 | video_device = video->attached_array[i].bind_info; | |
1683 | if (video_device && video_device->backlight) | |
1684 | acpi_video_set_brightness(video_device->backlight); | |
1685 | } | |
ac7729da RW |
1686 | |
1687 | return NOTIFY_OK; | |
863c1490 MG |
1688 | } |
1689 | ||
c504f8cb ZR |
1690 | static acpi_status |
1691 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1692 | void **return_value) | |
1693 | { | |
1694 | struct acpi_device *device = context; | |
1695 | struct acpi_device *sibling; | |
1696 | int result; | |
1697 | ||
1698 | if (handle == device->handle) | |
1699 | return AE_CTRL_TERMINATE; | |
1700 | ||
1701 | result = acpi_bus_get_device(handle, &sibling); | |
1702 | if (result) | |
1703 | return AE_OK; | |
1704 | ||
1705 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1706 | return AE_ALREADY_EXISTS; | |
1707 | ||
1708 | return AE_OK; | |
1709 | } | |
1710 | ||
67b662e1 AL |
1711 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1712 | { | |
99678ed7 HG |
1713 | struct backlight_properties props; |
1714 | struct pci_dev *pdev; | |
1715 | acpi_handle acpi_parent; | |
1716 | struct device *parent = NULL; | |
1717 | int result; | |
1718 | static int count; | |
1719 | char *name; | |
67b662e1 | 1720 | |
99678ed7 HG |
1721 | result = acpi_video_init_brightness(device); |
1722 | if (result) | |
1723 | return; | |
1724 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1725 | if (!name) | |
1726 | return; | |
1727 | count++; | |
67b662e1 | 1728 | |
99678ed7 | 1729 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1730 | |
99678ed7 HG |
1731 | pdev = acpi_get_pci_dev(acpi_parent); |
1732 | if (pdev) { | |
1733 | parent = &pdev->dev; | |
1734 | pci_dev_put(pdev); | |
1735 | } | |
67b662e1 | 1736 | |
99678ed7 HG |
1737 | memset(&props, 0, sizeof(struct backlight_properties)); |
1738 | props.type = BACKLIGHT_FIRMWARE; | |
1739 | props.max_brightness = device->brightness->count - 3; | |
1740 | device->backlight = backlight_device_register(name, | |
1741 | parent, | |
1742 | device, | |
1743 | &acpi_backlight_ops, | |
1744 | &props); | |
1745 | kfree(name); | |
1746 | if (IS_ERR(device->backlight)) | |
1747 | return; | |
67b662e1 | 1748 | |
99678ed7 HG |
1749 | /* |
1750 | * Save current brightness level in case we have to restore it | |
1751 | * before acpi_video_device_lcd_set_level() is called next time. | |
1752 | */ | |
1753 | device->backlight->props.brightness = | |
1754 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1755 | |
99678ed7 HG |
1756 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1757 | device->dev, &video_cooling_ops); | |
1758 | if (IS_ERR(device->cooling_dev)) { | |
1759 | /* | |
1760 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1761 | * Also, why the hell we are returning early and not attempt to | |
1762 | * register video output if cooling device registration failed? | |
1763 | * -- dtor | |
1764 | */ | |
1765 | device->cooling_dev = NULL; | |
1766 | return; | |
67b662e1 | 1767 | } |
99678ed7 HG |
1768 | |
1769 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1770 | device->cooling_dev->id); | |
1771 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1772 | &device->cooling_dev->device.kobj, | |
1773 | "thermal_cooling"); | |
1774 | if (result) | |
1775 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1776 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1777 | &device->dev->dev.kobj, "device"); | |
1778 | if (result) | |
1779 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1780 | } |
1781 | ||
1782 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1783 | { | |
1784 | struct acpi_video_device *dev; | |
1785 | ||
53a92ba7 HG |
1786 | if (video->backlight_registered) |
1787 | return 0; | |
1788 | ||
99678ed7 HG |
1789 | if (!acpi_video_verify_backlight_support()) |
1790 | return 0; | |
1791 | ||
67b662e1 AL |
1792 | mutex_lock(&video->device_list_lock); |
1793 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1794 | acpi_video_dev_register_backlight(dev); | |
1795 | mutex_unlock(&video->device_list_lock); | |
1796 | ||
99678ed7 HG |
1797 | video->backlight_registered = true; |
1798 | ||
67b662e1 AL |
1799 | video->pm_nb.notifier_call = acpi_video_resume; |
1800 | video->pm_nb.priority = 0; | |
1801 | return register_pm_notifier(&video->pm_nb); | |
1802 | } | |
1803 | ||
1804 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1805 | { | |
1806 | if (device->backlight) { | |
1807 | backlight_device_unregister(device->backlight); | |
1808 | device->backlight = NULL; | |
1809 | } | |
1810 | if (device->brightness) { | |
1811 | kfree(device->brightness->levels); | |
1812 | kfree(device->brightness); | |
1813 | device->brightness = NULL; | |
1814 | } | |
1815 | if (device->cooling_dev) { | |
1816 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1817 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1818 | thermal_cooling_device_unregister(device->cooling_dev); | |
1819 | device->cooling_dev = NULL; | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1824 | { | |
1825 | struct acpi_video_device *dev; | |
99678ed7 HG |
1826 | int error; |
1827 | ||
1828 | if (!video->backlight_registered) | |
1829 | return 0; | |
1830 | ||
1831 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1832 | |
1833 | mutex_lock(&video->device_list_lock); | |
1834 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1835 | acpi_video_dev_unregister_backlight(dev); | |
1836 | mutex_unlock(&video->device_list_lock); | |
1837 | ||
99678ed7 HG |
1838 | video->backlight_registered = false; |
1839 | ||
67b662e1 AL |
1840 | return error; |
1841 | } | |
1842 | ||
1843 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1844 | { | |
1845 | acpi_status status; | |
1846 | struct acpi_device *adev = device->dev; | |
1847 | ||
1848 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1849 | acpi_video_device_notify, device); | |
1850 | if (ACPI_FAILURE(status)) | |
1851 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1852 | else | |
1853 | device->flags.notify = 1; | |
1854 | } | |
1855 | ||
1856 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1857 | { | |
1858 | struct input_dev *input; | |
1859 | struct acpi_video_device *dev; | |
1860 | int error; | |
1861 | ||
1862 | video->input = input = input_allocate_device(); | |
1863 | if (!input) { | |
1864 | error = -ENOMEM; | |
1865 | goto out; | |
1866 | } | |
1867 | ||
1868 | error = acpi_video_bus_start_devices(video); | |
1869 | if (error) | |
1870 | goto err_free_input; | |
1871 | ||
1872 | snprintf(video->phys, sizeof(video->phys), | |
1873 | "%s/video/input0", acpi_device_hid(video->device)); | |
1874 | ||
1875 | input->name = acpi_device_name(video->device); | |
1876 | input->phys = video->phys; | |
1877 | input->id.bustype = BUS_HOST; | |
1878 | input->id.product = 0x06; | |
1879 | input->dev.parent = &video->device->dev; | |
1880 | input->evbit[0] = BIT(EV_KEY); | |
1881 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1882 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1883 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1884 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1885 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1886 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1887 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1888 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1889 | ||
1890 | error = input_register_device(input); | |
1891 | if (error) | |
1892 | goto err_stop_dev; | |
1893 | ||
1894 | mutex_lock(&video->device_list_lock); | |
1895 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1896 | acpi_video_dev_add_notify_handler(dev); | |
1897 | mutex_unlock(&video->device_list_lock); | |
1898 | ||
1899 | return 0; | |
1900 | ||
1901 | err_stop_dev: | |
1902 | acpi_video_bus_stop_devices(video); | |
1903 | err_free_input: | |
1904 | input_free_device(input); | |
1905 | video->input = NULL; | |
1906 | out: | |
1907 | return error; | |
1908 | } | |
1909 | ||
1910 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1911 | { | |
1912 | if (dev->flags.notify) { | |
1913 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1914 | acpi_video_device_notify); | |
1915 | dev->flags.notify = 0; | |
1916 | } | |
1917 | } | |
1918 | ||
1919 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1920 | { | |
1921 | struct acpi_video_device *dev; | |
1922 | ||
1923 | mutex_lock(&video->device_list_lock); | |
1924 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1925 | acpi_video_dev_remove_notify_handler(dev); | |
1926 | mutex_unlock(&video->device_list_lock); | |
1927 | ||
1928 | acpi_video_bus_stop_devices(video); | |
1929 | input_unregister_device(video->input); | |
1930 | video->input = NULL; | |
1931 | } | |
1932 | ||
53a92ba7 HG |
1933 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
1934 | unsigned long val, void *bd) | |
1935 | { | |
1936 | struct backlight_device *backlight = bd; | |
1937 | struct acpi_video_bus *video; | |
1938 | ||
1939 | /* acpi_video_verify_backlight_support only cares about raw devices */ | |
1940 | if (backlight->props.type != BACKLIGHT_RAW) | |
1941 | return NOTIFY_DONE; | |
1942 | ||
1943 | video = container_of(nb, struct acpi_video_bus, backlight_nb); | |
1944 | ||
1945 | switch (val) { | |
1946 | case BACKLIGHT_REGISTERED: | |
1947 | if (!acpi_video_verify_backlight_support()) | |
1948 | acpi_video_bus_unregister_backlight(video); | |
1949 | break; | |
1950 | case BACKLIGHT_UNREGISTERED: | |
1951 | acpi_video_bus_register_backlight(video); | |
1952 | break; | |
1953 | } | |
1954 | ||
1955 | return NOTIFY_OK; | |
1956 | } | |
1957 | ||
1958 | static int acpi_video_bus_add_backlight_notify_handler( | |
1959 | struct acpi_video_bus *video) | |
1960 | { | |
1961 | int error; | |
1962 | ||
1963 | video->backlight_nb.notifier_call = acpi_video_backlight_notify; | |
1964 | video->backlight_nb.priority = 0; | |
1965 | error = backlight_register_notifier(&video->backlight_nb); | |
1966 | if (error == 0) | |
1967 | video->backlight_notifier_registered = true; | |
1968 | ||
1969 | return error; | |
1970 | } | |
1971 | ||
1972 | static int acpi_video_bus_remove_backlight_notify_handler( | |
1973 | struct acpi_video_bus *video) | |
1974 | { | |
1975 | if (!video->backlight_notifier_registered) | |
1976 | return 0; | |
1977 | ||
1978 | video->backlight_notifier_registered = false; | |
1979 | ||
1980 | return backlight_unregister_notifier(&video->backlight_nb); | |
1981 | } | |
1982 | ||
67b662e1 AL |
1983 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1984 | { | |
1985 | struct acpi_video_device *dev, *next; | |
1986 | ||
1987 | mutex_lock(&video->device_list_lock); | |
1988 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1989 | list_del(&dev->entry); | |
1990 | kfree(dev); | |
1991 | } | |
1992 | mutex_unlock(&video->device_list_lock); | |
1993 | ||
1994 | return 0; | |
1995 | } | |
1996 | ||
ac7729da RW |
1997 | static int instance; |
1998 | ||
4be44fcd | 1999 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 2000 | { |
f51e8391 | 2001 | struct acpi_video_bus *video; |
f51e8391 | 2002 | int error; |
c504f8cb ZR |
2003 | acpi_status status; |
2004 | ||
2005 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
2006 | device->parent->handle, 1, | |
2007 | acpi_video_bus_match, NULL, | |
2008 | device, NULL); | |
2009 | if (status == AE_ALREADY_EXISTS) { | |
2010 | printk(KERN_WARNING FW_BUG | |
2011 | "Duplicate ACPI video bus devices for the" | |
2012 | " same VGA controller, please try module " | |
2013 | "parameter \"video.allow_duplicates=1\"" | |
2014 | "if the current driver doesn't work.\n"); | |
2015 | if (!allow_duplicates) | |
2016 | return -ENODEV; | |
2017 | } | |
1da177e4 | 2018 | |
36bcbec7 | 2019 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 2020 | if (!video) |
d550d98d | 2021 | return -ENOMEM; |
1da177e4 | 2022 | |
e6d9da1d ZR |
2023 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2024 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2025 | if (instance) | |
2026 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 2027 | instance++; |
e6d9da1d | 2028 | } |
f3b39f13 ZY |
2029 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2030 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2031 | if (instance) | |
2032 | device->pnp.bus_id[3] = '0' + instance; | |
2033 | instance++; | |
2034 | } | |
e6d9da1d | 2035 | |
e6afa0de | 2036 | video->device = device; |
1da177e4 LT |
2037 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2038 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2039 | device->driver_data = video; |
1da177e4 LT |
2040 | |
2041 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2042 | error = acpi_video_bus_check(video); |
2043 | if (error) | |
2044 | goto err_free_video; | |
1da177e4 | 2045 | |
bbac81f5 | 2046 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2047 | INIT_LIST_HEAD(&video->video_device_list); |
2048 | ||
ea9f8856 IM |
2049 | error = acpi_video_bus_get_devices(video, device); |
2050 | if (error) | |
91e13aa3 | 2051 | goto err_put_video; |
1da177e4 | 2052 | |
1da177e4 | 2053 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2054 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2055 | video->flags.multihead ? "yes" : "no", | |
2056 | video->flags.rom ? "yes" : "no", | |
2057 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
2058 | mutex_lock(&video_list_lock); |
2059 | list_add_tail(&video->entry, &video_bus_head); | |
2060 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2061 | |
67b662e1 AL |
2062 | acpi_video_bus_register_backlight(video); |
2063 | acpi_video_bus_add_notify_handler(video); | |
53a92ba7 | 2064 | acpi_video_bus_add_backlight_notify_handler(video); |
ac7729da | 2065 | |
f51e8391 DT |
2066 | return 0; |
2067 | ||
67b662e1 | 2068 | err_put_video: |
f51e8391 DT |
2069 | acpi_video_bus_put_devices(video); |
2070 | kfree(video->attached_array); | |
67b662e1 | 2071 | err_free_video: |
f51e8391 | 2072 | kfree(video); |
db89b4f0 | 2073 | device->driver_data = NULL; |
1da177e4 | 2074 | |
f51e8391 | 2075 | return error; |
1da177e4 LT |
2076 | } |
2077 | ||
51fac838 | 2078 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2079 | { |
4be44fcd | 2080 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2081 | |
1da177e4 LT |
2082 | |
2083 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2084 | return -EINVAL; |
1da177e4 | 2085 | |
50dd0969 | 2086 | video = acpi_driver_data(device); |
1da177e4 | 2087 | |
53a92ba7 | 2088 | acpi_video_bus_remove_backlight_notify_handler(video); |
67b662e1 AL |
2089 | acpi_video_bus_remove_notify_handler(video); |
2090 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2091 | acpi_video_bus_put_devices(video); |
1da177e4 | 2092 | |
67b662e1 AL |
2093 | mutex_lock(&video_list_lock); |
2094 | list_del(&video->entry); | |
2095 | mutex_unlock(&video_list_lock); | |
2096 | ||
6044ec88 | 2097 | kfree(video->attached_array); |
1da177e4 LT |
2098 | kfree(video); |
2099 | ||
d550d98d | 2100 | return 0; |
1da177e4 LT |
2101 | } |
2102 | ||
c6996bdd AC |
2103 | static int __init is_i740(struct pci_dev *dev) |
2104 | { | |
2105 | if (dev->device == 0x00D1) | |
2106 | return 1; | |
2107 | if (dev->device == 0x7000) | |
2108 | return 1; | |
2109 | return 0; | |
2110 | } | |
2111 | ||
74a365b3 MG |
2112 | static int __init intel_opregion_present(void) |
2113 | { | |
c6996bdd | 2114 | int opregion = 0; |
74a365b3 MG |
2115 | struct pci_dev *dev = NULL; |
2116 | u32 address; | |
2117 | ||
2118 | for_each_pci_dev(dev) { | |
2119 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2120 | continue; | |
2121 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2122 | continue; | |
c6996bdd AC |
2123 | /* We don't want to poke around undefined i740 registers */ |
2124 | if (is_i740(dev)) | |
2125 | continue; | |
74a365b3 MG |
2126 | pci_read_config_dword(dev, 0xfc, &address); |
2127 | if (!address) | |
2128 | continue; | |
c6996bdd | 2129 | opregion = 1; |
74a365b3 | 2130 | } |
c6996bdd | 2131 | return opregion; |
74a365b3 MG |
2132 | } |
2133 | ||
8e5c2b77 | 2134 | int acpi_video_register(void) |
1da177e4 | 2135 | { |
8e5c2b77 | 2136 | int result = 0; |
86e437f0 ZY |
2137 | if (register_count) { |
2138 | /* | |
8e5c2b77 RW |
2139 | * if the function of acpi_video_register is already called, |
2140 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2141 | */ |
2142 | return 0; | |
2143 | } | |
1da177e4 | 2144 | |
67b662e1 AL |
2145 | mutex_init(&video_list_lock); |
2146 | INIT_LIST_HEAD(&video_bus_head); | |
2147 | ||
1da177e4 | 2148 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2149 | if (result < 0) |
d550d98d | 2150 | return -ENODEV; |
1da177e4 | 2151 | |
86e437f0 ZY |
2152 | /* |
2153 | * When the acpi_video_bus is loaded successfully, increase | |
2154 | * the counter reference. | |
2155 | */ | |
2156 | register_count = 1; | |
2157 | ||
d550d98d | 2158 | return 0; |
1da177e4 | 2159 | } |
8e5c2b77 | 2160 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2161 | |
86e437f0 ZY |
2162 | void acpi_video_unregister(void) |
2163 | { | |
2164 | if (!register_count) { | |
2165 | /* | |
2166 | * If the acpi video bus is already unloaded, don't | |
2167 | * unload it again and return directly. | |
2168 | */ | |
2169 | return; | |
2170 | } | |
2171 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2172 | ||
86e437f0 ZY |
2173 | register_count = 0; |
2174 | ||
2175 | return; | |
2176 | } | |
2177 | EXPORT_SYMBOL(acpi_video_unregister); | |
2178 | ||
1b7f37e1 HG |
2179 | void acpi_video_unregister_backlight(void) |
2180 | { | |
2181 | struct acpi_video_bus *video; | |
2182 | ||
2183 | if (!register_count) | |
2184 | return; | |
2185 | ||
2186 | mutex_lock(&video_list_lock); | |
2187 | list_for_each_entry(video, &video_bus_head, entry) | |
2188 | acpi_video_bus_unregister_backlight(video); | |
2189 | mutex_unlock(&video_list_lock); | |
2190 | } | |
2191 | EXPORT_SYMBOL(acpi_video_unregister_backlight); | |
2192 | ||
74a365b3 MG |
2193 | /* |
2194 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2195 | * the video opregion code to be run first in order to initialise | |
2196 | * state before any ACPI video calls are made. To handle this we defer | |
2197 | * registration of the video class until the opregion code has run. | |
2198 | */ | |
2199 | ||
2200 | static int __init acpi_video_init(void) | |
2201 | { | |
45cb50e6 ZR |
2202 | dmi_check_system(video_dmi_table); |
2203 | ||
74a365b3 MG |
2204 | if (intel_opregion_present()) |
2205 | return 0; | |
2206 | ||
2207 | return acpi_video_register(); | |
2208 | } | |
1da177e4 | 2209 | |
86e437f0 | 2210 | static void __exit acpi_video_exit(void) |
1da177e4 | 2211 | { |
86e437f0 | 2212 | acpi_video_unregister(); |
1da177e4 | 2213 | |
d550d98d | 2214 | return; |
1da177e4 LT |
2215 | } |
2216 | ||
2217 | module_init(acpi_video_init); | |
2218 | module_exit(acpi_video_exit); |